From d8c8fcae38b3efda783ee066e50c6e0c900219dc Mon Sep 17 00:00:00 2001
From: Bas Zalmstra <bas@prefix.dev>
Date: Thu, 12 Dec 2024 17:06:01 +0100
Subject: [PATCH] fix: check reflink support before linking (#979)

---
 Cargo.toml                        |  2 +-
 crates/rattler/src/install/mod.rs | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index a64de0d68..cee85eaf0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -107,7 +107,7 @@ plist = "1"
 purl = { version = "0.1.3", features = ["serde"] }
 quote = "1.0.37"
 rand = "0.8.5"
-reflink-copy = "0.1.19"
+reflink-copy = "0.1.20"
 regex = "1.11.1"
 reqwest = { version = "0.12.9", default-features = false }
 reqwest-middleware = "0.4.0"
diff --git a/crates/rattler/src/install/mod.rs b/crates/rattler/src/install/mod.rs
index ef1a17965..cc81a6b4d 100644
--- a/crates/rattler/src/install/mod.rs
+++ b/crates/rattler/src/install/mod.rs
@@ -300,9 +300,16 @@ pub async fn link_package(
         match options.allow_hard_links {
             Some(value) => ready(value).left_future(),
             None => can_create_hardlinks(target_dir, package_dir).right_future(),
-        }
+        },
     );
-    let allow_ref_links = options.allow_ref_links.unwrap_or(allow_hard_links);
+    let allow_ref_links = options.allow_ref_links.unwrap_or_else(|| {
+        match reflink_copy::check_reflink_support(package_dir, target_dir) {
+            Ok(reflink_copy::ReflinkSupport::Supported) => true,
+            Ok(reflink_copy::ReflinkSupport::NotSupported) => false,
+            Ok(reflink_copy::ReflinkSupport::Unknown) => allow_hard_links,
+            Err(_) => false,
+        }
+    });
 
     // Determine the platform to use
     let platform = options.platform.unwrap_or(Platform::current());